Added \platform annotations.
diff --git a/Doc/lib/libsyslog.tex b/Doc/lib/libsyslog.tex
index 1068db9..a0bdd45 100644
--- a/Doc/lib/libsyslog.tex
+++ b/Doc/lib/libsyslog.tex
@@ -1,7 +1,8 @@
 \section{\module{syslog} ---
-         \UNIX{} syslog library routines.}
-\declaremodule{builtin}{syslog}
+         \UNIX{} syslog library routines}
 
+\declaremodule{builtin}{syslog}
+  \platform{UNIX}
 \modulesynopsis{An interface to the \UNIX{} syslog library routines.}